Archive image from page 282 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 Fig. 274. PoLysiphonia ina- crocarpa Harv. a, summit of a filament with young cy- stocarps. b, transverse sec- tion of a filament, {a, about 200:1, b, 150:1). Fig. 273. Polysiphonia macrocarpa Harv. Part of a female plant. (About 16:1). filaments are about 100// thick, but both thinner and thicker ones are to be found. The length of the cells in these filaments is rather variable. Generally they are about one and a half to twice as long as they are broad, but often the

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Archive image from page 282 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 Fig. 274. PoLysiphonia ina- crocarpa Harv. a, summit of a filament with young cy- stocarps. b, transverse sec- tion of a filament, {a, about 200:1, b, 150:1). Fig. 273. Polysiphonia macrocarpa Harv. Part of a female plant. (About 16:1). filaments are about 100// thick, but both thinner and thicker ones are to be found. The length of the cells in these filaments is rather variable. Generally they are about one and a half to twice as long as they are broad, but often they are three to four times as long or even longer. Upwards the filaments taper gradually and in the upper ends they are only 20—25// thick. The erect filaments are often un- branched at their base. If we examine such a young filament in vigorous growth 18

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